Dust cap for fluid coupling

Abstract

A dust cap for a fluid coupling includes a generally cylindrical body which is mounted on the coupling and an end wall at one end of the cylindrical body. The end wall is provided with a slit therein for permitting another coupling to be inserted through the end wall and a stress relief opening at each end of the slit. A flexible and resilient flap covers each of the stress relief openings, and a fluid drain port is provided in the cylindrical body.

I claim: 
     
       1. A dust cap for a coupling comprising a generally cylindrical body adapted to be mounted on the coupling, an end wall at one end of the cylindrical body, the end wall having a slit therein for permitting another coupling to be inserted through the end-wall and a stress relief opening at each end of the slot, and a flap covering each of the stress relief openings which is flexible and resilient and adapted to sealingly engage a coupling which is inserted through the end wall. 
     
     
       2. The dust cap of claim 1 in which the cylindrical body is provided with a drain port therethrough. 
     
     
       3. The dust cap of claim 1 in which the cylindrical body is provided with a pair of generally diametrically opposed drain ports therethrough. 
     
     
       4. The dust cap of claim 1 including a reinforcing means surrounding the cylindrical body adjacent the end wall. 
     
     
       5. The dust cap of claim 1 in which the cylindrical body is provided with an annular groove in the outer wall thereof adjacent the end wall, and a reinforcing metal ring positioned in the annular groove. 
     
     
       6. The dust cap of claim 1 including a clamping means surrounding the cylindrical body adjacent the end opposite said one end for clamping the cylindrical body to the coupling. 
     
     
       7. The coupling of claim 1 in which each of said flaps includes a first end which is attached to the end wall radially outwardly of the associated stress relief opening and a second end which extends radially inwardly to cover the stress relief opening. 
     
     
       8. The dust cap of claim 1 in which the dust cap is molded from elastomeric material and the flaps are molded integrally with the end wall.